libreoffice/include/vcl/lstbox.hxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 *
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_VCL_LSTBOX_HXX
#define INCLUDED_VCL_LSTBOX_HXX

#include <sal/types.h>
#include <o3tl/typed_flags_set.hxx>
#include <vcl/dllapi.h>
#include <vcl/ctrl.hxx>

#define LISTBOX_APPEND              (SAL_MAX_INT32)
#define LISTBOX_ENTRY_NOTFOUND      (SAL_MAX_INT32)
#define LISTBOX_ERROR               (SAL_MAX_INT32)
#define LISTBOX_MAX_ENTRIES         (SAL_MAX_INT32 - 1)

// the following defines can be used for the SetEntryFlags()
// and GetEntryFlags() methods

// !! Do not use these flags for user data as they are reserved      !!
// !! to change the internal behaviour of the ListBox implementation !!
// !! for specific entries.                                          !!

enum class ListBoxEntryFlags
{
    NONE                    = 0x0000,
/** this flag disables a selection of an entry completely. It is not
    possible to select such entries either from the user interface
    nor from the ListBox methods. Cursor traveling is handled correctly.
    This flag can be used to add titles to a ListBox.
*/
    DisableSelection        = 0x0001,

/** this flag can be used to make an entry multiline capable
    A normal entry is single line and will therefore be clipped
    at the right listbox border. Setting this flag enables
    word breaks for the entry text.
*/
    MultiLine               = 0x0002,

/** this flags lets the item be drawn disabled (e.g. in grey text)
    usage only guaranteed with ListBoxEntryFlags::DisableSelection
*/
    DrawDisabled            = 0x0004,
};
namespace o3tl
{
    template<> struct typed_flags<ListBoxEntryFlags> : is_typed_flags<ListBoxEntryFlags, 0x0007> {};
}

class Image;
class ImplListBox;
class ImplListBoxFloatingWindow;
class ImplBtn;
class ImplWin;
class ImplListBoxWindow;

class VCL_DLLPUBLIC ListBox : public Control
{
private:
    VclPtr<ImplListBox>                mpImplLB;
    VclPtr<ImplListBoxFloatingWindow>  mpFloatWin;
    VclPtr<ImplWin>                    mpImplWin;
    VclPtr<ImplBtn>                    mpBtn;
    sal_uInt16                  mnDDHeight;
    sal_Int32                   mnSaveValue;
    sal_Int32                   m_nMaxWidthChars;
    Link<ListBox&,void>          maSelectHdl;
    Link<ListBox&,void>         maDoubleClickHdl;
    sal_uInt16                  mnLineCount;

    bool            mbDDAutoSize : 1;
    bool            mbEdgeBlending : 1;

private:
    SAL_DLLPRIVATE void    ImplInitListBoxData();

    DECL_DLLPRIVATE_LINK( ImplSelectHdl, LinkParamNone*, void );
    DECL_DLLPRIVATE_LINK( ImplScrollHdl, ImplListBox*, void );
    DECL_DLLPRIVATE_LINK( ImplCancelHdl, LinkParamNone*, void );
    DECL_DLLPRIVATE_LINK( ImplDoubleClickHdl, ImplListBoxWindow*, void );
    DECL_DLLPRIVATE_LINK( ImplPopupModeEndHdl, FloatingWindow*, void );
    DECL_DLLPRIVATE_LINK( ImplSelectionChangedHdl, sal_Int32, void );
    DECL_DLLPRIVATE_LINK( ImplUserDrawHdl, UserDrawEvent*, void );
    DECL_DLLPRIVATE_LINK( ImplFocusHdl, sal_Int32, void );
    DECL_DLLPRIVATE_LINK( ImplListItemSelectHdl, LinkParamNone*, void );

    DECL_DLLPRIVATE_LINK( ImplClickBtnHdl, void*, void );

protected:
    using Window::ImplInit;
    SAL_DLLPRIVATE void    ImplInit( vcl::Window* pParent, WinBits nStyle );
    SAL_DLLPRIVATE static WinBits ImplInitStyle( WinBits nStyle );
    bool               IsDropDownBox() const { return mpFloatWin != nullptr; }

protected:
    explicit            ListBox( WindowType nType );

    virtual void        FillLayoutData() const override;

public:
    explicit            ListBox( vcl::Window* pParent, WinBits nStyle = WB_BORDER );
    virtual             ~ListBox() override;
    virtual void        dispose() override;

    virtual void        ApplySettings(vcl::RenderContext& rRenderContext) override;
    virtual void        Draw( OutputDevice* pDev, const Point& rPos, const Size& rSize, DrawFlags nFlags ) override;
    virtual void        Resize() override;
    virtual bool        PreNotify( NotifyEvent& rNEvt ) override;
    virtual void        StateChanged( StateChangedType nType ) override;
    virtual void        DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual void        UserDraw( const UserDrawEvent& rUDEvt );

    virtual void        Select();
    virtual void        DoubleClick();
    virtual void        GetFocus() override;
    virtual void        LoseFocus() override;

    virtual const Wallpaper& GetDisplayBackground() const override;

    virtual void        setPosSizePixel( long nX, long nY,
                                         long nWidth, long nHeight, PosSizeFlags nFlags = PosSizeFlags::All ) override;

    Rectangle           GetDropDownPosSizePixel() const;

    void                AdaptDropDownLineCountToMaximum();
    void                SetDropDownLineCount( sal_uInt16 nLines );
    sal_uInt16          GetDropDownLineCount() const;

    void                EnableAutoSize( bool bAuto );
    bool                IsAutoSizeEnabled() const { return mbDDAutoSize; }

    void                EnableDDAutoWidth( bool b );

    sal_Int32           InsertEntry( const OUString& rStr, sal_Int32  nPos = LISTBOX_APPEND );
    sal_Int32           InsertEntry( const OUString& rStr, const Image& rImage, sal_Int32  nPos = LISTBOX_APPEND );
    void                RemoveEntry( const OUString& rStr );
    void                RemoveEntry( sal_Int32  nPos );

    void                Clear();

    sal_Int32           GetEntryPos( const OUString& rStr ) const;
    sal_Int32           GetEntryPos( const void* pData ) const;
    Image               GetEntryImage( sal_Int32  nPos ) const;
    OUString            GetEntry( sal_Int32  nPos ) const;
    sal_Int32           GetEntryCount() const;

    void                SelectEntry( const OUString& rStr, bool bSelect = true );
    void                SelectEntryPos( sal_Int32  nPos, bool bSelect = true );

    sal_Int32           GetSelectEntryCount() const;
    OUString            GetSelectEntry( sal_Int32  nSelIndex = 0 ) const;
    sal_Int32           GetSelectEntryPos( sal_Int32  nSelIndex = 0 ) const;

    bool                IsEntrySelected(const OUString& rStr) const;
    bool                IsEntryPosSelected( sal_Int32  nPos ) const;
    void                SetNoSelection();

    void                SetEntryData( sal_Int32  nPos, void* pNewData );
    void*               GetEntryData( sal_Int32  nPos ) const;
    void*               GetSelectEntryData() const { return GetEntryData(GetSelectEntryPos()); }

    /** this methods stores a combination of flags from the
        ListBoxEntryFlags::* defines at the given entry.
        See description of the possible ListBoxEntryFlags::* flags
        for details.
        Do not use these flags for user data as they are reserved
        to change the internal behaviour of the ListBox implementation
        for specific entries.
    */
    void                SetEntryFlags( sal_Int32  nPos, ListBoxEntryFlags nFlags );

    /** this methods gets the current combination of flags from the
        ListBoxEntryFlags::* defines from the given entry.
        See description of the possible ListBoxEntryFlags::* flags
        for details.
    */
    ListBoxEntryFlags   GetEntryFlags( sal_Int32  nPos ) const;

    void                SetTopEntry( sal_Int32  nPos );
    sal_Int32           GetTopEntry() const;

    void                SaveValue() { mnSaveValue = GetSelectEntryPos(); }
    sal_Int32           GetSavedValue() const { return mnSaveValue; }
    bool                IsValueChangedFromSaved() const { return mnSaveValue != GetSelectEntryPos(); }

    void                SetSeparatorPos( sal_Int32 n );
    sal_Int32           GetSeparatorPos() const;

    bool                IsTravelSelect() const;
    bool                IsInDropDown() const;
    void                ToggleDropDown();

    void                EnableMultiSelection( bool bMulti, bool bStackSelection );
    void                EnableMultiSelection( bool bMulti );
    bool                IsMultiSelectionEnabled() const;

    void                SetReadOnly( bool bReadOnly = true );
    bool                IsReadOnly() const;

    Rectangle           GetBoundingRectangle( sal_Int32  nItem ) const;

    void                EnableUserDraw( bool bUserDraw );

    void                DrawEntry( const UserDrawEvent& rEvt, bool bDrawImage, bool bDrawTextAtImagePos );

    void                SetSelectHdl( const Link<ListBox&,void>& rLink )     { maSelectHdl = rLink; }
    const Link<ListBox&,void>& GetSelectHdl() const                    { return maSelectHdl; }
    void                SetDoubleClickHdl( const Link<ListBox&,void>& rLink ) { maDoubleClickHdl = rLink; }
    const Link<ListBox&,void>& GetDoubleClickHdl() const               { return maDoubleClickHdl; }

    Size                CalcSubEditSize() const;    //size of area inside lstbox, i.e. no scrollbar/dropdown
    Size                CalcMinimumSize() const;    //size of lstbox area, i.e. including scrollbar/dropdown
    virtual Size        GetOptimalSize() const override;
    Size                CalcAdjustedSize( const Size& rPrefSize ) const;
    Size                CalcBlockSize( sal_uInt16 nColumns, sal_uInt16 nLines ) const;
    void                GetMaxVisColumnsAndLines( sal_uInt16& rnCols, sal_uInt16& rnLines ) const;

    sal_uInt16          GetDisplayLineCount() const;

    void                EnableMirroring();

    bool                GetEdgeBlending() const { return mbEdgeBlending; }
    void                SetEdgeBlending(bool bNew);

    /** checks whether a certain point lies within the bounds of
        a listbox item and returns the item as well as the character position
        the point is at.

        <p>If the point is inside an item the item pos is put into <code>rPos</code> and
        the item-relative character index is returned. If the point is not inside
        an item -1 is returned and rPos is unchanged.</p>

        @param rPoint
        tells the point for which an item is requested.

        @param rPos
        gets the item at the specified point <code>rPoint</code>

        @returns
        the item-relative character index at point <code>rPos</code> or -1
        if no item is at that point.
     */
    using Control::GetIndexForPoint;
    long GetIndexForPoint( const Point& rPoint, sal_Int32 & rPos ) const;

    void setMaxWidthChars(sal_Int32 nWidth);

    virtual bool set_property(const OString &rKey, const OString &rValue) override;

    void EnableQuickSelection( bool b );

    static sal_Int32 NaturalSortCompare(const OUString &rA, const OUString &rB);

    virtual FactoryFunction GetUITestFactory() const override;
};

class VCL_DLLPUBLIC MultiListBox : public ListBox
{
public:
    explicit        MultiListBox( vcl::Window* pParent, WinBits nStyle );

};

#endif // INCLUDED_VCL_LSTBOX_HXX

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